Blow-off cock



March 8,1927.

o. HUF'F BLOW-OFF COCK Filedaune 22. 1925 so 20 .4 277 Q ir-roRA/Ek Patented Mar. 8, 1927.

dz. "ri n have OMER RUFF, on rnnslvo; oAL IFomvm.

Application filed June 22, 1925. Serial No. 38,625.

My invention relatesto a blow-ofi' cock to use with steam boilers and the like.

Heretofore in the use of blow-ofli'. cocks of the usual type considerable dilticultyhas 5 been experienced therewith .due to the fact that the scale and other residuum from the boiler, -in-its passage through thevalve duringtheblow-off, tends to cut or abrade parts of the valve, thereby causing a leakage and 10 otherwise damaging the same and, necessitating frequent renewals. i

.It is the object of my invention to .provide a cock so constructed and arranged as to alford protection for, the working parts 15 of the valve against abrasion and other dam age from the impurities flowing from the boiler during the blow-ofl, and which Wlll be simple in construction and operation and of a maximum eifioiency. V

.A further object is to provide in a cock of the above character means for supplying a lubricant to the interior thereof by means of which the workingparts thereof are protected from corrosion and freezing. Other objects and advantages will appear hereinafter and, while I have shown and will describe the preferred form of my invention, I wish it understood that I donot limit myself to such preferred form, but that various changes and adaptations. may be made therein. without departing from the spirit of my invention.

1 In the drawings accompanying and forming a part hereof:

Fig. 1 is a central longitudinal section, partly in elevation, of my invention detached from its place of use. Fig. 2 is a right hand end elevation of Fig. 1.

prises abody member 10 provided-at each' end with a flange 11 or--12-. P vided en 3 is a top plan of my device with trally of .member: is a vertically extendmg recess 13 which tapers downwardly and lnwardly. and surrounding the upper end of this recess is an annular flange 14 pro- 3 vided with a concentric recess 15 in the upper .facethereof, which. recess is connected to they upper end of. recess 13.f Extending longitudinally of bodymember l0 are recesses 16 and 17. Recesses .16 and 17. are circular at their outer ends and taper inwardly and terminate at their inner ends in .elongated slots 18. and 19. the purpose of which will be obvious. Mounted within recess is a ring 20 provided with oppositely disposed, inwardly extending, stops 21 and 22 the radial edges of which are bevelled as beSt. shown in Fig. 9. It is here noted that .ring 20 can be made integral with body 10. Revolubly mounted in recess 13 is a cup-shaped member 23 on the upper edge of which are provided radially extending lugs 24 and 25 the radial edges of which are bevelled, as best shown in Fig. 7, which lugs are adapted for engagement with stops 21 fand22 of ring '20. 1 Cup 23 is provided with oppositely disposed, elongated apertures 26 and 27 adapted to register with the elongated apertures 19 and 1180f member 10. Revolubly mounted within cup 23 is a plug 28 provided with an upwardly extending stem29 the upper end of which is a square at 30, the purposeof which will be obvious. Plug 28 is provided on its upper end; with oppositely extending projections 31 and 32 adapted for engagement with the lugs 24 and 25 of cup 23. Plug 28 is provided with a transverse elongated aperture 33 adapted to register with the apertures 26 and 27 of cup 23 when the valve is in its open position. y 7

. The upper end ofrecess 15is closed by a cap34 provided with a flange 35 which coincides with flange. 14: and is held-positioned bolts 36 which pass through flanges 35 and. 14c. Cap 34 is provided with a downw'a'rdly projecting annular rim 37 which rests upon and coincides with ring 20' and fserves to hold said ring: against" rotaltion Provided in} the interior ofcap 3Q is a grease chamber 38 which is filled by lneans ofan alemitefitt-in g 39f Provided in the upper-end of cap 34:..isran annular packing-rchamber l io adapted to. receivepack;

ing material 41 and mounted within said chamber, immediately below packing 41, is a gland 42. Coiled around stem 29, between gland 42 and the upper end of plug 28, is a coil spring 43, the purpose of which is to press gland 42 upwardly to assist packing a l in providing a tight joint between stem 29 and cap 34 In the operation of my device when in its normal closed position the parts will lie in the positions shown in Fig. hen it is desired to open the same, stem 29 will be rotated counter clockwise thereby causing projections 31 and 32 on plug 28 to engage the lugs 24 and 25 of cup 23, and continue to rotate the plug 28 and cup 23 counter clockwise until the lugs 24: and 25 engage steps 21 and 22 on ring 20, thereby bringing the apertures 26 and 27 of cup 23 into registry with the apertures 19 and 18 of body 10. Stem 29 is then rotated in a reverse direction to the position shown in Fig. 3, bringing the aperture 33 into register with apertures 26 and 27 of cup 23. In closing off the valve this operation will be reversed.

Having described my invention, what I claim is:

1. A blow-ott cock comprising a body member; a vertically extending, downwardly tapering, recess in said body member centrally of the length thereof; longitudinally extending recesses in said body memher; an annular recess surrounding the upper end of said vertical recess; a hollow cup revolubly mounted in said vertical recess having opposed apertures therein adapted to be brought into registry with said body recesses; a plug revolubly mounted in said cup having an aperture therethrough adapted to be brought into registry with the apertures in said cup; an annular ring mounted in said annular recess provided with oppositely disposed, inwardly projecting stops; outwardly projecting lugs on the upper end of said cup adapted to engage the stops on said ring; radially extending projections on said plug adapted to engage the lugs on said cup, whereby said cup and plug are-rotated in unison; and means to rotate said plug.

2. In a blow off cock the combination of a circular chamber having outlets on the line of a diameter thereof, a circular cup member adapted to rotatably fit in the circular chamber, said cup having two openings through the wall on the line of a diameter, said openings being adapted when assembled with the chamber to register with the openings in the chamber, a plug adapted to ro tatably fit withinthe cup :and having an opening therethrough on the line of a diameter, said plug opening being adapted to register with the cup openings; fixed stop members on the rim of the chamber, lugs onthe rim of the cup adapted when assembled to engage with the stop members on the chamber rim, and projections attached to the plug and adapted to engage the lugs on the cup, said stop members, lugs and projections being positioned so that by turning the plug in one direction, to-witz counter clockwise, so that the projections engage the lugs. and the lugs engage the stop members, the openings in the cup and the chamber will register, and then by turning the plug in the opposite direction, to-wit: clockwise, so that the projections disengage the lugs the openings in the chamber and the cup will register, said cup and plug being adapted to rotate separately and rotate in unison.

3. In a blow oif cook the combination of a circular chamber having outlets on the line of a diameter thereof, a circular cup member adaptedto rotatably fit in the circular chamber, said cup having two openings through the wall on the line of a diameter, said openings being adapted when assembled with the chamber to register with the openings in the chamber, a plug adapted to rotatably fit within the cup and having an opening therethrough on the line of a diameter, said plug opening being adapted to register with the cup openings, fixed stop members on the rim of the chamber, lugs on the rim of the cup adapted when assembled to engage with the stop members on the chamber rim, and projections attached to the plug and adapted to engage the lugs on the cup, said stop members, lugs and projections being positioned so that by turning the plug and cup counterclockwise until the projections engage the lugs and the lugs engage the stops, the openings in the cup and plug will not register and the openings in the cup and chamber will register, and then by turning the plug clockwise to a predetermined position, the openings in the plug and cup will register.

4. In a blow off cook the combination of a circular chamber, acircular cup adapted to rotatably fit in the chamber and a plug adapted to rotatably fit in the cup, a hole transversely through the assembled chamber, cup and plug, along a line of a common diameter of said chamber, cup and plug, means for turning the plug within the cup, means for turning the plug and cup in unison consisting of a projection on the plug and a lug on the cup adapted to engage each other when the plug is turned and stop means on the chamber adapted to stop the rotation when the holes in the chamber and cup are aligned when turned in one direction, to-wit: counterclockwise, and stop means on the chamber for stopping the rotation when the cup is turned in the opposite direction, to-wit: clockwise, when the said holes in the chamber and cup will not be in alignment, the projection on the plug and the projection engaged the lug, a position the lug on the cup being positioned so that can be found where the holes through the m when the projection engages the lug when plug and through the cup will register.

the plug is given a clockwise movement, the In witness that I claim the foregoing I hole through the plug and the hole through have hereunto set my hand this 28th day of the cup are not aligned, and when the plug January, 1925.

is turned in the opposite direction, to-wit:

counter-clockwise from the position where OMER HUFF. 

